Some things everyone should know (but may not)

[r/tguy02]

i'd also add a piece in there under octane ratings for those select individuals living outside the US who deal with different octane rating scale than we do, i see this confusion all the time in posts.

[liconhomeie]

so if im reading this correctly, my SRT-D will actually run better on the 87 pump gas than the 91?

[NickKo]

so if im reading this correctly, my SRT-D will actually run better on the 87 pump gas than the 91?

It depends.
"Your results may vary" depending upon climate / season, local gasoline quality, geographic location, type of driving (local vs. interstate), age of the engine / engine condition, etc.

For example, you may find that you get better MPG's on an interstate trip with 91 octane in hot weather; but better MPG in cold winter weather, with 87.
There can be many different variables.


- Nick

[liconhomeie]

ok. but will the 91 octane harm my vehicle? im not too worried about abut mpg. cause even if i "drive it like i stole it" and dont shift until 5k, i still get about 20mpg. which isnt bad. i just dont want to do anything to mess this engine up. i love this little car and hope to keep her running for a very long time.

[NickKo]

ok. but will the 91 octane harm my vehicle? im not too worried about abut mpg. cause even if i "drive it like i stole it" and dont shift until 5k, i still get about 20mpg. which isnt bad. i just dont want to do anything to mess this engine up. i love this little car and hope to keep her running for a very long time.

No harm will come from running 91 octane. (Or 93, for that matter)
The only ill effect is that the engine might take a bit longer to start - Especially in cold weather.

If anything - If you drive the car hard, it is probably better to run 91, as added insurance !! I would.


- Nick

[Assisapya]

What octane rating do you usually use in your SRT-D, and have you noticed any differences in performance or fuel efficiency between 87 and 91 octane?

[occasional demons]

I wouldn't expect any answers from the above posters, as only a few of us are around theses days.

The SRT-D is no different than a regular neon as far as the engine. There is zero benefit to anything above 87 octane. The 2003 and up 2.0 is 9.3:1 compression, compared to the 2002 and older which was 9.8:1 compression. The drop in compression makes higher octane even more of a waste.


Do you even have those octane ratings in Russia?

[DenisSoymn]

What considerations should one keep in mind when it comes to fuel octane ratings, especially in situations where there may be variations like the one mentioned with a local gas station?

[Midnight_Rider]

Another question from Russia?